Watch this reporter test the world's highest glass-bottomed bridge with a sledgehammer

Glass-bottomed walkways and observation platforms hold a certain fascination for us a species. There's something about the beautiful view, combined with the instinctual fear of death, that makes these creations so attractive... and lucrative.

You might remember a similar story from a few years ago, when a group of young men got scared shitless by the famous Skydeck of the Willis Tower cracking underneath them. Apparently, this kind of thing happens from time to time. It happened on London's Tower bridge a couple years ago, and it happened on a different walkway in China last fall. Each time, only the top layer of glass was affected.

So does that mean these attractions are completely safe? Well... kind of. You're not going to crack the glass and fall through, but this newest bridge is designed to hold up to 800 people, some of whom will already be scared out of their minds walking over a glass-bottomed bridge. If the top layer cracks, it could easily cause a massive panic, which could lead to a stampede.

Bottom line: The walkways are safe. As always, it's your fellow human beings you need to watch out for.

For decades, artists have been testing the line between "art" and "just stuff," and a couple of pranksters proved recently that the question remains unsettled. In a prank—or a work of art?—descended directly from Duchamp and his "readymades," they left an ordinary pair of glasses on a gallery floor.